package huang.teamwork15;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class UserDao {
		BaseDao bd=new BaseDao();
		Connection con=null;
		PreparedStatement ps=null;
		ResultSet rs=null;
		//关闭数据库
		public void close() throws SQLException{
			if(rs!=null){
				rs.close();
			}
			if(ps!=null){
				ps.close();
			}
			if(con!=null){
				con.close();
			}
		}
		//通过用户名查找数据库得用户信息
		public User selectUserbyName(String name) throws SQLException {
			con=bd.getCon();
			String sql="select *from user where username=?";
			ps=con.prepareStatement(sql);
			ps.setString(1, name);
			rs=ps.executeQuery();
			String username=null;
			String pwd=null;
			while(rs.next()){
				username=rs.getString("username");
				pwd=rs.getString("pwd");
			}
			close();
			User user=new User(username,pwd);
			return user;
		}
}